After a few changes.

“Stay here” you tell Irene and walk over to Lenny. “Tell me the truth Lenny” you say “Did you enjoy spanking Irene and watching me hurt her?”

“No” says Lenny “I don’t like hurting people, even bitches like Irene”

You want Lenny to enjoy fucking Irene, but unless you make him a sadist he probably won’t. You therefore decide to take another tack.

You walk back to Irene “Irene” you say “Forget everything that has happened since you entered this room. Forget you had sex with me or were ever attracted to me. You will believe you came up here to be alone with Lenny because he’s the only one who can let you enjoy sex. You will forget ever having an orgasm, either by yourself or with another person accept Lenny. You will believe that your bitchiness comes from sexual frustration because until you met Lenny you had never reached sexual climax before. Lenny, however, can not only make you climax but do it easily whether with his hand, his tongue, his cock or whatever. Of course his tongue is better than his fingers and his cock is better than his tongue, but the thing you like best is when he cums inside you since you always climax simultaneously with him and do so harder and more pleasurably than you ever imagined you could before meeting him. Also having sex with Lenny makes you feel better about yourself and less bitchy. Every time you orgasm, especially when you have simultaneous orgasm with him, all the nastiness, meanness and bitchiness is washed away in a tide of pleasure and you find yourself enjoying being nice to people. Because you like yourself better when you’re nice you will want Lenny to make love to you as often as possible, and will always be happy to let him do so. You will also feel no jealousy if he decides to sleep with other women and will find you are happy for them that they are enjoying him too. Now close your eyes and lie here until someone touches you.”

You walk over to Lenny. “Lenny, I want you to forget I was here. You have come up here to make love to Irene. You like making her orgasm as much as possible. Thankfully the thing that makes her orgasm the most is you cumming inside her. You also know that the more orgasms you give her the better person she is afterward since her bitchiness is based on sexual frustration that only you can cure. You will therefore try to have sex with her as often as possible so she remains a nice person. This will never feel like chore, especially since she will be happy to allow you to sleep with other women. Now you will stay here until I leave the room then you will forget I was ever here and go over, touch Irene and give her as many orgasms as you can.

You get dressed and walk out leaving Lenny and Irene to enjoy each other.